Waterproof sensor for 3D mapping

Hey. I was wondering if there is a sensor available that can handle 3D mapping while underwater. Similar to how ships use sonar to map underwater terrain. Basically, I'm making a robot that can go underwater and do 3D mapping for me.

Actually, identical to how...

Buy the equipment off the shelf.

A simple Google search would have revealed a plethora of resources to read and ponder. Here's a small sample.

Underwater Sonar (Analog)

Waterproof Ultrasonic Distance Sensors with Arduino

Wow! BlueRobotics has really taken off in the last couple of years. The Ping2 looks like a decent offering to the hobby community.

Their Ping360 sonar scanner looks pretty interesting as well.

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